Aspirator
First Claim
1. An adjustable pressure aspirator comprising:
- aspirating means for removing material by aspiration;
a receiving vessel connected to said aspirating means, said receiving vessel having an interior for collecting the material removed by aspiration;
vacuum means for producing a vacuum pressure within said receiving vessel;
pressure detecting means for detecting said vacuum pressure within said receiving vessel;
a vent for connecting the interior of said receiving vessel with atmosphere external to said vessel, said vent having an opening of variable size; and
pressure control means for controlling the vacuum pressure within the interior of said receiving vessel to maintain a constant pressure by adjusting the size of said opening, responsive to said detected vacuum pressure.
1 Assignment
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Accused Products
Abstract
The present invention relates to an aspirator for aspirating materials to be removed within the eyeball. The materials are an infusion or the viterous body.
A conventional aspirator permits no easy provision of an arbitrary pressure. In accordance with the present invention, a pressure adjusting unit (90) is disposed to connect an accommodating unit (100) to the air through an opening (96) of a variable size.
For such a conventional aspirator, it is required that aspiration should be interrupted as a bottle is full with the removed materials. For the present invention, there are provided a first accommodating unit (2100), a second accommodating unit (2101) and a third accommodating unit (2102). The third accommodating unit (2102) has a capacity larger than each of the first and second accommodating units (2100, 2101). These accommodating units are connected.
Furthermore, such a conventional aspirator may not ensure a safety in surgery. In accordance with the present invention, a flexible passage portion (3020) is disposed in the main body (3005) of the aspirator in such a manner that the passage portion (3020) is opened or closed by operation of a materials-passage opening/closing unit (3003).
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Citations
15 Claims
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1. An adjustable pressure aspirator comprising:
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aspirating means for removing material by aspiration; a receiving vessel connected to said aspirating means, said receiving vessel having an interior for collecting the material removed by aspiration; vacuum means for producing a vacuum pressure within said receiving vessel; pressure detecting means for detecting said vacuum pressure within said receiving vessel; a vent for connecting the interior of said receiving vessel with atmosphere external to said vessel, said vent having an opening of variable size; and pressure control means for controlling the vacuum pressure within the interior of said receiving vessel to maintain a constant pressure by adjusting the size of said opening, responsive to said detected vacuum pressure. - View Dependent Claims (2, 3, 4)
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5. An adjustable pressure aspirator comprising:
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aspirating means for removing material by aspiration; a first receiving vessel connected to said aspirating means, said first receiving vessel having an interior for collecting the material removed by aspiration; a second receiving vessel having an interior for collecting the material removed by aspiration, said interior of said second receiving vessel having substantially the same capacity as said interior of said first receiving vessel; a first passage for transferring the collected material from said first receiving vessel to said second receiving vessel; a valve mounted in said first passage for opening or closing said first passage; vacuum means, interconnected between said first and second receiving vessels, for establishing a vacuum within said first and second receiving vessels; pressure detecting means for detecting pressure within said first receiving vessel; a vent for connecting the interior of said first receiving vessel with atmosphere external to said first receiving vessel, said vent having an opening of variable size; and pressure control means for controlling the vacuum within said first receiving vessel at a constant pressure by adjusting the size of said opening, responsive to said detected pressure. - View Dependent Claims (6)
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7. An adjustable pressure aspirator comprising:
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aspirating means for removing material by aspiration; a first receiving vessel connected to said aspirating means, said first receiving vessel having an interior for collecting the material removed by aspiration; a second receiving vessel having an interior for collecting material removed by aspiration, said interior of said second receiving vessel having a capacity larger than said interior of said first receiving vessel; a first elastic conduit for passage of the collected material from said first receiving vessel to said second receiving vessel; constricting means for repeatedly constricting said first elastic conduit to convey the collected material through said first elastic conduit; vacuum means for establishing a vacuum within said interior of said first receiving vessel; pressure detecting means for detecting pressure within said interior of said first receiving vessel; a vent for connecting the interior of said first receiving vessel with atmosphere external to said first receiving vessel, said vent having an opening of variable size; and pressure control means for controlling the vacuum within said first receiving vessel at a constant pressure by adjusting the size of said opening, responsive to said detected pressure. - View Dependent Claims (8)
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9. An aspirator for removing material by vacuum comprising:
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a first receiving vessel for collecting the material removed by vacuum; a second receiving vessel for collecting the material removed by vacuum; a third receiving vessel for collecting the material removed by vacuum, said third receiving vessel having a capacity larger than said first receiving vessel and larger than said second receiving vessel; an aspirating instrument for applying the vacuum to the material to be removed; a first passage for conveyance of the removed material from said aspirating instrument to said first receiving vessel; first vacuum means for producing a vacuum within said first receiving vessel; second vacuum means for producing a vacuum within said second receiving vessel; a second passage, separate from said first passage, for conveyance of the collected material from said first collecting vessel to said second collecting vessel; a first valve provided within said second passage for opening or closing said second passage; a third passage, separate from said second passage, for conveyance of the collected material from said second receiving vessel to said third receiving vessel; and a second valve provided within said third passage for opening or closing said third passage; whereby a pressure within said second receiving vessel not higher than the pressure within said first receiving vessel will cause conveyance of the collected material from said first receiving vessel to said second receiving vessel and wherein a pressure within said second receiving vessel higher than the pressure within said third receiving vessel will cause conveyance of the collected material within said second receiving vessel to said third receiving vessel, through said third passage. - View Dependent Claims (10, 11, 12)
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13. An aspirator for removing material by vacuum, said aspirator comprising:
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a plurality of receiving vessels for collecting the material removed by vacuum; vacuum means for establishing a vacuum within each said receiving vessel; a housing for each said vacuum means, said receiving vessel being detachably mounted to said housing; an aspirating tool for applying said vacuum to the material to be removed; a plurality of conduits, each of said conduits having, at least a portion which is elastic, for conveying the removed material from said aspirating tool to said receiving vessel; and constricting means, mounted within each of said housings, for limiting flow through each of said conduits by deformation of said elastic portion. - View Dependent Claims (14, 15)
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Specification